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<Title>Multi-Layer Gantt Chart</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Multi-Layer Gantt Chart</p>
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<img src="images/layergantt.png" width='620' height='280'>
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This example demonstrates a gantt chart containing two layers for the planned and actual dates.<br><br>
The two layers are created using <a href="XYChart.addBoxWhiskerLayer.htm">XYChart.addBoxWhiskerLayer</a>. The bar width of the top layer is set using <a href="BaseBoxLayer.setDataWidth.htm">BaseBoxLayer.setDataWidth</a> to a narrow width so that it will not block the bottom layer.<br><br>
In this example, the color of the top layer is a pattern color created using an 4 x 4 in-memory pattern with <a href="BaseChart.patternColor.htm">BaseChart.patternColor</a>.
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/layergantt.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%
// the names of the tasks
String[] labels = {"Market Research", "Define Specifications", "Overall Archiecture",
    "Project Planning", "Detail Design", "Software Development", "Test Plan", "Testing and QA",
    "User Documentation"};

// the planned start dates and end dates for the tasks
Date[] startDate = {new GregorianCalendar(2004, 7, 16).getTime(), new GregorianCalendar(2004, 7, 30
    ).getTime(), new GregorianCalendar(2004, 8, 13).getTime(), new GregorianCalendar(2004, 8, 20
    ).getTime(), new GregorianCalendar(2004, 8, 27).getTime(), new GregorianCalendar(2004, 9, 4
    ).getTime(), new GregorianCalendar(2004, 9, 25).getTime(), new GregorianCalendar(2004, 10, 1
    ).getTime(), new GregorianCalendar(2004, 10, 8).getTime()};
Date[] endDate = {new GregorianCalendar(2004, 7, 30).getTime(), new GregorianCalendar(2004, 8, 13
    ).getTime(), new GregorianCalendar(2004, 8, 27).getTime(), new GregorianCalendar(2004, 9, 4
    ).getTime(), new GregorianCalendar(2004, 9, 11).getTime(), new GregorianCalendar(2004, 10, 8
    ).getTime(), new GregorianCalendar(2004, 10, 8).getTime(), new GregorianCalendar(2004, 10, 22
    ).getTime(), new GregorianCalendar(2004, 10, 22).getTime()};

// the actual start dates and end dates for the tasks up to now
Date[] actualStartDate = {new GregorianCalendar(2004, 7, 16).getTime(), new GregorianCalendar(2004,
    7, 27).getTime(), new GregorianCalendar(2004, 8, 9).getTime(), new GregorianCalendar(2004, 8, 18
    ).getTime(), new GregorianCalendar(2004, 8, 22).getTime()};
Date[] actualEndDate = {new GregorianCalendar(2004, 7, 27).getTime(), new GregorianCalendar(2004, 8,
    9).getTime(), new GregorianCalendar(2004, 8, 27).getTime(), new GregorianCalendar(2004, 9, 2
    ).getTime(), new GregorianCalendar(2004, 9, 8).getTime()};

// Create a XYChart object of size 620 x 280 pixels. Set background color to light green (ccffcc)
// with 1 pixel 3D border effect.
XYChart c = new XYChart(620, 280, 0xccffcc, 0x000000, 1);

// Add a title to the chart using 15 points Times Bold Itatic font, with white (ffffff) text on a
// dark green (0x6000) background
c.addTitle("Multi-Layer Gantt Chart Demo", "Times New Roman Bold Italic", 15, 0xffffff
    ).setBackground(0x006000);

// Set the plotarea at (140, 55) and of size 460 x 200 pixels. Use alternative white/grey
// background. Enable both horizontal and vertical grids by setting their colors to grey (c0c0c0).
// Set vertical major grid (represents month boundaries) 2 pixels in width
c.setPlotArea(140, 55, 460, 200, 0xffffff, 0xeeeeee, Chart.LineColor, 0xc0c0c0, 0xc0c0c0
    ).setGridWidth(2, 1, 1, 1);

// swap the x and y axes to create a horziontal box-whisker chart
c.swapXY();

// Set the y-axis scale to be date scale from Aug 16, 2004 to Nov 22, 2004, with ticks every 7 days
// (1 week)
c.yAxis().setDateScale(new GregorianCalendar(2004, 7, 16).getTime(), new GregorianCalendar(2004, 10,
    22).getTime(), 86400 * 7);

// Add a red (ff0000) dash line to represent the current day
c.yAxis().addMark(Chart.CTime(new GregorianCalendar(2004, 9, 8).getTime()), c.dashLineColor(
    0xff0000, Chart.DashLine));

// Set multi-style axis label formatting. Month labels are in Arial Bold font in "mmm d" format.
// Weekly labels just show the day of month and use minor tick (by using '-' as first character of
// format string).
c.yAxis().setMultiFormat(Chart.StartOfMonthFilter(), "&lt;*font=Arial Bold*&gt;{value|mmm d}",
    Chart.StartOfDayFilter(), "-{value|d}");

// Set the y-axis to shown on the top (right + swapXY = top)
c.setYAxisOnRight();

// Set the labels on the x axis
c.xAxis().setLabels(labels);

// Reverse the x-axis scale so that it points downwards.
c.xAxis().setReverse();

// Set the horizontal ticks and grid lines to be between the bars
c.xAxis().setTickOffset(0.5);

// Use blue (0000aa) as the color for the planned schedule
int plannedColor = 0x0000aa;

// Use a red hash pattern as the color for the actual dates. The pattern is created as a 4 x 4
// bitmap defined in memory as an array of colors.
int[] hashPattern = {0xffffff, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff,
    0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xffffff};
int actualColor = c.patternColor(hashPattern, 4);

// Add a box whisker layer to represent the actual dates. We add the actual dates layer first, so it
// will be the top layer.
BoxWhiskerLayer actualLayer = c.addBoxLayer(Chart.CTime(actualStartDate),
    Chart.CTime(actualEndDate), actualColor, "Actual");

// Set the bar height to 8 pixels so they will not block the bottom bar
actualLayer.setDataWidth(8);

// Add a box-whisker layer to represent the planned schedule date
c.addBoxLayer(Chart.CTime(startDate), Chart.CTime(endDate), plannedColor, "Planned").setBorderColor(
    Chart.SameAsMainColor);

// Add a legend box on the top right corner (595, 60) of the plot area with 8 pt Arial Bold font.
// Use a semi-transparent grey (80808080) background.
LegendBox b = c.addLegend(595, 60, false, "Arial Bold", 8);
b.setAlignment(Chart.TopRight);
b.setBackground(0x80808080, -1, 2);

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "",
    "title='{xLabel} ({dataSetName}): {top|mmm dd, yyyy} to {bottom|mmm dd, yyyy}'"));
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Multi-Layer Gantt Chart&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Multi-Layer Gantt Chart
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here is the chart image ****** --&gt;
    &lt;%= viewer.renderHTML(response) %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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